{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2010:AMJK36T3KPXIPPSWMDTCRJQNL2","short_pith_number":"pith:AMJK36T3","schema_version":"1.0","canonical_sha256":"0312adfa7b53ee87be5660e628a60d5e9a7dcd65693bb60c68f9c5aff8f4da48","source":{"kind":"arxiv","id":"1008.4567","version":2},"attestation_state":"computed","paper":{"title":"Dynamical Selection of the Primordial Density Fluctuation Amplitude","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"hep-th","authors_text":"Jean-Luc Lehners, Paul J. Steinhardt","submitted_at":"2010-08-26T19:20:58Z","abstract_excerpt":"In inflationary models, the predicted amplitude of primordial density perturbations Q is much larger than the observed value (~10^{-5}) for natural choices of parameters. To explain the requisite exponential fine-tuning, anthropic selection is often invoked, especially in cases where microphysics is expected to produce a complex energy landscape. By contrast, we find examples of ekpyrotic models based on heterotic M-theory for which dynamical selection naturally favors the observed value of Q."},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1008.4567","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2010-08-26T19:20:58Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"bda68728e979671f4e10cb749b4c46f06d683d033b5967baa41b05985262f469","abstract_canon_sha256":"8275356bebe587b9c36dd00b1f02f3b4332916442a3a1b18e90b393ae2087d0d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:27:45.052835Z","signature_b64":"VVvpG8zoLSL2q10cBqeANhtOWNca0HIVvY7vlVSmF8avskBWnU5FQHwmuXiVc3Z7r7+zzlbYpK1EYlqB25lWAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0312adfa7b53ee87be5660e628a60d5e9a7dcd65693bb60c68f9c5aff8f4da48","last_reissued_at":"2026-05-18T04:27:45.052179Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:27:45.052179Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Dynamical Selection of the Primordial Density Fluctuation Amplitude","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"hep-th","authors_text":"Jean-Luc Lehners, Paul J. Steinhardt","submitted_at":"2010-08-26T19:20:58Z","abstract_excerpt":"In inflationary models, the predicted amplitude of primordial density perturbations Q is much larger than the observed value (~10^{-5}) for natural choices of parameters. To explain the requisite exponential fine-tuning, anthropic selection is often invoked, especially in cases where microphysics is expected to produce a complex energy landscape. By contrast, we find examples of ekpyrotic models based on heterotic M-theory for which dynamical selection naturally favors the observed value of Q."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1008.4567","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1008.4567","created_at":"2026-05-18T04:27:45.052273+00:00"},{"alias_kind":"arxiv_version","alias_value":"1008.4567v2","created_at":"2026-05-18T04:27:45.052273+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1008.4567","created_at":"2026-05-18T04:27:45.052273+00:00"},{"alias_kind":"pith_short_12","alias_value":"AMJK36T3KPXI","created_at":"2026-05-18T12:26:05.355336+00:00"},{"alias_kind":"pith_short_16","alias_value":"AMJK36T3KPXIPPSW","created_at":"2026-05-18T12:26:05.355336+00:00"},{"alias_kind":"pith_short_8","alias_value":"AMJK36T3","created_at":"2026-05-18T12:26:05.355336+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/AMJK36T3KPXIPPSWMDTCRJQNL2","json":"https://pith.science/pith/AMJK36T3KPXIPPSWMDTCRJQNL2.json","graph_json":"https://pith.science/api/pith-number/AMJK36T3KPXIPPSWMDTCRJQNL2/graph.json","events_json":"https://pith.science/api/pith-number/AMJK36T3KPXIPPSWMDTCRJQNL2/events.json","paper":"https://pith.science/paper/AMJK36T3"},"agent_actions":{"view_html":"https://pith.science/pith/AMJK36T3KPXIPPSWMDTCRJQNL2","download_json":"https://pith.science/pith/AMJK36T3KPXIPPSWMDTCRJQNL2.json","view_paper":"https://pith.science/paper/AMJK36T3","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1008.4567&json=true","fetch_graph":"https://pith.science/api/pith-number/AMJK36T3KPXIPPSWMDTCRJQNL2/graph.json","fetch_events":"https://pith.science/api/pith-number/AMJK36T3KPXIPPSWMDTCRJQNL2/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/AMJK36T3KPXIPPSWMDTCRJQNL2/action/timestamp_anchor","attest_storage":"https://pith.science/pith/AMJK36T3KPXIPPSWMDTCRJQNL2/action/storage_attestation","attest_author":"https://pith.science/pith/AMJK36T3KPXIPPSWMDTCRJQNL2/action/author_attestation","sign_citation":"https://pith.science/pith/AMJK36T3KPXIPPSWMDTCRJQNL2/action/citation_signature","submit_replication":"https://pith.science/pith/AMJK36T3KPXIPPSWMDTCRJQNL2/action/replication_record"}},"created_at":"2026-05-18T04:27:45.052273+00:00","updated_at":"2026-05-18T04:27:45.052273+00:00"}